Kichs



Patented April 26, |881.

w -Le d NJTERS, PHOTD-LITHOGRAFNER. WASHINGTON. D. C.

4Student vLamp.

o. 11A. H-INRIGHS 481,- o. RBISTLE.

(No Model.)

' UNTTE STATES PATENT OFFICE.

CHARLES F. A. HINRICHS AND CHARLES REISTLE, OF BROOKLYN, NEW YORK, ASSIGNORS TO SAID HINRIOHS.

STUDNT-LAM P.

SPECIFICATION forming part of Letters Patent No. 240,711, dated April 26,1881.

Application tiled January 31, 1881. (No model.)

To all whom it may concern:

`Be it known that we, GHARLEs F. A. HIN- Ricns and CHARLES REIsTLE, of Brooklyn, in the county'of Kin gs and State of New York, have invented an Improvement in Student- Lam ps, of which thefollowingis a specification.

The object of the present invention is to prevent an overflow of the oil in the burner of the student-lamp and to direct the air with great uniformity upon the ilame.

In studentlamps difficulty sometimes arises from thelarnp beinginclined When moved from place to place. This is often the case when the lamp is not burn ing, the inclination of the lamp causing the liquid to leave the lower end ofthe inverted fount, so that the air passes into the fount and more oil runs out and the burner overilows, either by the oil rising above the top of the wick-tube, or else so high that capillary attraction draws the oil over.

lWe provide a rest within the reservoir for supper-ting the fountain with the valve closed, so that the oil cannot run from said fountain until the parts are turned around so that a projection on the fountain passes down into the notch or opening of the support, and the fountain descends and the valve is opened.

In the drawings, Figure l is a vertical sec tion of the fountain and partial section of the burner in the student-lamp. Fig. 2 is a partial section of the fountain as supported by its rest, with the valve closed. Fig.3 is a sectional plan of the rest at the line .n w, and Fig. 4 is a plan of the cone and chimney-holder detached.

The fountain a., reservoir b, oil-tube c, standard d, wick-tube e, air-tube f, and wick g are of any known or desired character, similar to those employed in student-lamps. rI he valve f is hollow and attached to a stem, fi, and the body of the valve is made cylindrical and slides freely in the cylinder g', and the lower endof thiscylinder g' is contracted to form a seat for the valve f. y

m The bridge li forms a guide tfor the stem t', and it also limits the movement of the valve when the fountain is inverted and the valve is open. There are lateral openings at 3 for the oil to pass freely from the cylinder g' into the fountain, and a float, Z, sliding freely on the stem i, acts when the fountain is being filled to lift the valve and indicate when the fountain is nearly full.

The oil-stand m is a short cylinder at the lower end of the fountain. The edge of the same touching the oil in the fountain excludes the atmosphere and the oil cannot run out of the fountain until the consumption of the oil reducesv the level and admits air into the fountain as usual. Upon this oil-stand m there is a projection or feather, o, and upon the bottom of the reservoir there is the rest n, that is notched orformed with an openin g at one place, adapted to receive the feather or projection o. When the projection o is upon the top of the rest a the 4fountain is supported with the end of the valve-stem free from the bottom of the reservoir, so that the valve will remain closed and no oil cau run from it. Vhen the fountain is turned so that the projection o enters the notch or hole in a, the fountain will descend to its normal position and the valve be opened, so that oil will pass to the burner.

rEhe Argand burner of the student-lamp has been made With a cone between the chimneyholder' and the Wick-tube. Insome instances this cone has beenvperforated, and in other instances there has been an opening between the top of the cone and the wick-tube.

In our improved student-lamp the upper part of the eonep is formed with openings at s s, and the metal above such openings is bent inwardlyin a iluted form,as attt. These flutes or corrugations serve to steady the ascending currents of air, and the openings at the bases of the iutes allow air to pass up outside ofthe metal of the cone. By this means the volume of air is not materially lessened, the action of the air is rendered uniform, and the upper end of the cone becomes a corrugated spring-ring to set around the wick-tube and steady the chimney-holder where the same is made removable with the chimney from the burner.

We are aware that lamps have been made with atubeinside the oil-fountain and aleather valve and spring. In this case the valve is not tubular, with anelliptical end that passes down into the valve-seat, as in our case, and the valve is liable to leak.

By our improvement the valve is rendered very durable, an d foreign substances are not lia- IOO ble to adhere thereto, and the elliptical end deiects the oil to the lateral lopenings through the guide-tube when the fountainis being filled.

In the Patent No. 214,134 there is a float combined with avalve. In the present instance the valve is hollow and the oat passes into it, and the two float together in lifting the valve and stem when the fountain is lilled.

In cases where the valve-seat is formed of the metal of the lower end ofthe fountain and the valve-guide is soldered thereto, difficulty arises in placing the guide accurately in position to the seatand solderingit. This difficulty is removed by making the valve-seat in the contracted end of the tubular valve-guide.

We also are aware that sheet-metal screws have been used to connect the fountain to the interior of the reservoir.

In our present invention the circular notched rest simply serves as a support to the projection o and fountain,to keep the saine elevated except when the parts are turned forthe projection to pass into the notch.

We claim as our invention- 1. The combination, with the oil-fountain and reservoir in a student-lamp, of a tubular valve-guide having lateral openings and contracted at its lower end to form a seat, and a tubular valve having an elliptical closed end and sliding in said guide, substantially as set forth.

2. The combination, with the tubular valve having an elliptical closed end and the tubular guide and seat in the lamp-fountain, of a valvestem and a float sliding on said valve-stem, as and for the purposes set forth.

3. The combination, with the fountain, valve, and reservoir in a student-lamp, of the rest a within the reservoir, having an opening or notch, and the projection o on the fountain or oil-stand, substantially as set forth, whereby the fountain can be supported with the valve closed, as set forth.

4. The combination, with an Argand wicktube, of a cone, p, having openings and a corrugated upper edge, substantially as set forth.

Signed by us this 25th day of January, A. D. 1881i C. F. A. HINRICHS. CHARLES REISTLE.

Witnesses GEO. T. PINGKNEY, GHAs. H. SMITH. 

